چکیده مقاله
Recently the experience of recent near fault earthquakes such as Chi Chi, Kobe and Tabas earthquakes have shown that the structures are more vulnerable in the near source earthquakes This has also shown in many studies The main reason for that is due to a strong and long period velocity pulse which generates in the near field NF earthquakes Base isolation systems are one of the methods for reducing the damage and vulnerable in the near source earthquakes, seismic isolation system increase period vibration of structures which reduce seismic force and the amount of energy transferred into the structure In this paper, a parametric study has been carried out to study the behavior of based isolated concrete buildings in the near source earthquakes One base isolated concrete building with 7 stories is considered The variation of top floor absolute acceleration, base shear and bearing displacement of the isolated building is plotted under different isolator parameters such as bearing yield strength and post yield stiffness ratio The comparison of results indicated that for low values of the bearing yield strength and post yield stiffness ratio there is significant displacement in the lead rubber bearing LRB under near fault motions In addition the increase of isolation period causes the base shear and floor acceleration reduced, but bearing displacement increases very much
کلیدواژهها
نویسندگان
Beytollah Taromi
Ms Student, Zanjan University, Zanjan, Iran
Kiarash Nasserasadi
Assistant Professor, Department of Civil Engineering, Zanjan University, Zanjan, Iran
Asghar VataniOskouei
Assistant Professor, Department of Civil Engineering, Shahid Rajaee University,Tehran, Iran
شیوه ارجاع
Taromi, Beytollah and Nasserasadi, Kiarash and VataniOskouei, Asghar,1391,Influence of isolators characteristics on the response of base isolated structures in the near field earthquakes,9th International Congress on Civil Engineering,Isfahan
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